I'm in the process of buying the V&H Ovals 16727 for my stock 03' Ultra Classic - I've done an extensive amount of research and concluded I should add the V&H Fuel Pak (V&H Fuel Pak works good with V&H mufflers) and while I'm at it a K&N RK3909 high performance A/C - my objectives for the upgrade was to increase/improve the sound and additional "get up and go" - as soon as I get and install everything and the weather improves here in the Midwest (which should be in the spring), I'll post a thread.
Gvera - you'll be VERY happy with the results. I did the same (K&N, V&H Fishtails, but with a PC III) and it's a new bike! You'll really feel it want to pull with each twist of the throttle.
I have the slip-ons on my 02 RKC. Love the sound and she runs like a champ
Gettin too cold here in the northeast to ride, so these pages are all I have til April.
Can't wait to retire and move south & west
Be safe.